patch-2.4.6 linux/drivers/acpi/executer/exresnte.c
Next file: linux/drivers/acpi/executer/exresolv.c
Previous file: linux/drivers/acpi/executer/exregion.c
Back to the patch index
Back to the overall index
- Lines: 321
- Date:
Wed Jun 20 17:47:40 2001
- Orig file:
v2.4.5/linux/drivers/acpi/executer/exresnte.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/executer/exresnte.c linux/drivers/acpi/executer/exresnte.c
@@ -0,0 +1,320 @@
+
+/******************************************************************************
+ *
+ * Module Name: exresnte - AML Interpreter object resolution
+ * $Revision: 37 $
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000, 2001 R. Byron Moore
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include "acpi.h"
+#include "amlcode.h"
+#include "acparser.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "acnamesp.h"
+#include "actables.h"
+#include "acevents.h"
+
+
+#define _COMPONENT ACPI_EXECUTER
+ MODULE_NAME ("exresnte")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: Acpi_ex_resolve_node_to_value
+ *
+ * PARAMETERS: Stack_ptr - Pointer to a location on a stack that contains
+ * a pointer to a Node
+ * Walk_state - Current state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Resolve a Namespace node (AKA a "direct name pointer") to
+ * a valued object
+ *
+ * Note: for some of the data types, the pointer attached to the Node
+ * can be either a pointer to an actual internal object or a pointer into the
+ * AML stream itself. These types are currently:
+ *
+ * ACPI_TYPE_INTEGER
+ * ACPI_TYPE_STRING
+ * ACPI_TYPE_BUFFER
+ * ACPI_TYPE_MUTEX
+ * ACPI_TYPE_PACKAGE
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_ex_resolve_node_to_value (
+ ACPI_NAMESPACE_NODE **stack_ptr,
+ ACPI_WALK_STATE *walk_state)
+
+{
+ ACPI_STATUS status = AE_OK;
+ ACPI_OPERAND_OBJECT *val_desc;
+ ACPI_OPERAND_OBJECT *obj_desc = NULL;
+ ACPI_NAMESPACE_NODE *node;
+ u8 *aml_pointer = NULL;
+ ACPI_OBJECT_TYPE8 entry_type;
+ ACPI_INTEGER temp_val;
+ u8 attached_aml_pointer = FALSE;
+ u8 aml_opcode = 0;
+
+
+ /*
+ * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the
+ * object that is attached to the Node.
+ */
+
+ node = *stack_ptr;
+ val_desc = acpi_ns_get_attached_object (node);
+ entry_type = acpi_ns_get_type ((ACPI_HANDLE) node);
+
+ /*
+ * The Val_desc attached to the Node can be either:
+ * 1) An internal ACPI object
+ * 2) A pointer into the AML stream (into one of the ACPI system tables)
+ */
+
+ if (acpi_tb_system_table_pointer (val_desc)) {
+ /* CAN THIS EVERY HAPPEN NOW? TBD!!! */
+
+ attached_aml_pointer = TRUE;
+ aml_opcode = *((u8 *) val_desc);
+ aml_pointer = ((u8 *) val_desc) + 1;
+
+ }
+
+
+ /*
+ * Several Entry_types do not require further processing, so
+ * we will return immediately
+ */
+ /* Devices rarely have an attached object, return the Node
+ * and Method locals and arguments have a pseudo-Node
+ */
+ if (entry_type == ACPI_TYPE_DEVICE ||
+ (node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) {
+ return (AE_OK);
+ }
+
+ if (!val_desc) {
+ return (AE_AML_NO_OPERAND);
+ }
+
+ /*
+ * Action is based on the type of the Node, which indicates the type
+ * of the attached object or pointer
+ */
+ switch (entry_type) {
+
+ case ACPI_TYPE_PACKAGE:
+
+ if (attached_aml_pointer) {
+ /*
+ * This means that the package initialization is not parsed
+ * -- should not happen
+ */
+ return (AE_NOT_IMPLEMENTED);
+ }
+
+ /* Val_desc is an internal object in all cases by the time we get here */
+
+ if (ACPI_TYPE_PACKAGE != val_desc->common.type) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ /* Return an additional reference to the object */
+
+ obj_desc = val_desc;
+ acpi_ut_add_reference (obj_desc);
+ break;
+
+
+ case ACPI_TYPE_BUFFER:
+
+ if (attached_aml_pointer) {
+ /*
+ * This means that the buffer initialization is not parsed
+ * -- should not happen
+ */
+ return (AE_NOT_IMPLEMENTED);
+ }
+
+ /* Val_desc is an internal object in all cases by the time we get here */
+
+ if (ACPI_TYPE_BUFFER != val_desc->common.type) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ /* Return an additional reference to the object */
+
+ obj_desc = val_desc;
+ acpi_ut_add_reference (obj_desc);
+ break;
+
+
+ case ACPI_TYPE_STRING:
+
+ if (attached_aml_pointer) {
+ /* Allocate a new string object */
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_STRING);
+ if (!obj_desc) {
+ return (AE_NO_MEMORY);
+ }
+
+ /* Init the internal object */
+
+ obj_desc->string.pointer = (NATIVE_CHAR *) aml_pointer;
+ obj_desc->string.length = STRLEN (obj_desc->string.pointer);
+ }
+
+ else {
+ if (ACPI_TYPE_STRING != val_desc->common.type) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ /* Return an additional reference to the object */
+
+ obj_desc = val_desc;
+ acpi_ut_add_reference (obj_desc);
+ }
+
+ break;
+
+
+ case ACPI_TYPE_INTEGER:
+
+ /*
+ * The Node has an attached internal object, make sure that it's a
+ * number
+ */
+
+ if (ACPI_TYPE_INTEGER != val_desc->common.type) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ /* Return an additional reference to the object */
+
+ obj_desc = val_desc;
+ acpi_ut_add_reference (obj_desc);
+ break;
+
+
+ case ACPI_TYPE_BUFFER_FIELD:
+ case INTERNAL_TYPE_REGION_FIELD:
+ case INTERNAL_TYPE_BANK_FIELD:
+ case INTERNAL_TYPE_INDEX_FIELD:
+
+ status = acpi_ex_read_data_from_field (val_desc, &obj_desc);
+ break;
+
+
+ /*
+ * For these objects, just return the object attached to the Node
+ */
+
+ case ACPI_TYPE_MUTEX:
+ case ACPI_TYPE_METHOD:
+ case ACPI_TYPE_POWER:
+ case ACPI_TYPE_PROCESSOR:
+ case ACPI_TYPE_THERMAL:
+ case ACPI_TYPE_EVENT:
+ case ACPI_TYPE_REGION:
+
+
+ /* Return an additional reference to the object */
+
+ obj_desc = val_desc;
+ acpi_ut_add_reference (obj_desc);
+ break;
+
+
+ /* TYPE_Any is untyped, and thus there is no object associated with it */
+
+ case ACPI_TYPE_ANY:
+
+ return (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
+ break;
+
+
+ /*
+ * The only named references allowed are named constants
+ * e.g. -- Name (\OSFL, Ones)
+ */
+ case INTERNAL_TYPE_REFERENCE:
+
+ switch (val_desc->reference.opcode) {
+
+ case AML_ZERO_OP:
+
+ temp_val = 0;
+ break;
+
+ case AML_ONE_OP:
+
+ temp_val = 1;
+ break;
+
+ case AML_ONES_OP:
+
+ temp_val = ACPI_INTEGER_MAX;
+ break;
+
+ default:
+
+ return (AE_AML_BAD_OPCODE);
+ }
+
+ /* Create object for result */
+
+ obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+ if (!obj_desc) {
+ return (AE_NO_MEMORY);
+ }
+
+ obj_desc->integer.value = temp_val;
+
+ /* Truncate value if we are executing from a 32-bit ACPI table */
+
+ acpi_ex_truncate_for32bit_table (obj_desc, walk_state);
+ break;
+
+
+ /* Default case is for unknown types */
+
+ default:
+
+ return (AE_AML_OPERAND_TYPE);
+
+ } /* switch (Entry_type) */
+
+
+ /* Put the object descriptor on the stack */
+
+ *stack_ptr = (void *) obj_desc;
+ return (status);
+}
+
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)